diff -Nru kylin-display-switch-1.0.1/debian/changelog kylin-display-switch-1.0.1/debian/changelog
--- kylin-display-switch-1.0.1/debian/changelog	2017-12-20 11:39:01.000000000 +0800
+++ kylin-display-switch-1.0.1/debian/changelog	2018-10-30 16:01:11.000000000 +0800
@@ -1,3 +1,10 @@
+kylin-display-switch (1.0.1-0ubuntu1.1) bionic-proposed; urgency=medium
+
+  * Fix the wrong permission of file 'instance.lock'. (LP: #1766491)
+  * Fix the crash when press numlock.
+
+ -- handsome_feng <jianfengli@ubuntukylin.com>  Tue, 30 Oct 2018 16:01:11 +0800
+
 kylin-display-switch (1.0.1-0ubuntu1) bionic; urgency=medium
 
   * Initial release (LP: #1738366)
diff -Nru kylin-display-switch-1.0.1/debian/patches/fix_wrong_permission_file_and_add_missing_parentheses.diff kylin-display-switch-1.0.1/debian/patches/fix_wrong_permission_file_and_add_missing_parentheses.diff
--- kylin-display-switch-1.0.1/debian/patches/fix_wrong_permission_file_and_add_missing_parentheses.diff	1970-01-01 08:00:00.000000000 +0800
+++ kylin-display-switch-1.0.1/debian/patches/fix_wrong_permission_file_and_add_missing_parentheses.diff	2018-10-30 16:00:53.000000000 +0800
@@ -0,0 +1,32 @@
+--- a/kylin_display_switch.py
++++ b/kylin_display_switch.py
+@@ -1,7 +1,7 @@
+ #!/usr/bin/python3
+ # -*- coding: utf-8 -*-
+ 
+-import sys
++import os, sys, stat
+ from PyQt5.QtGui import *
+ from PyQt5.QtCore import *
+ from PyQt5.QtWidgets import *
+@@ -41,6 +41,11 @@
+ 
+     # singleton
+     def check_singleton(self):
++        if(os.path.exists("/tmp/instance_kds.lock") == False):
++            new_instance_file = open("/tmp/instance_kds.lock", 'w')
++            new_instance_file.close()
++            os.chmod("/tmp/instance_kds.lock", stat.S_IRWXU|stat.S_IRWXG|stat.S_IRWXO)
++
+         self.instance_file = open("/tmp/instance_kds.lock", 'w')
+         try:
+             fcntl.lockf(self.instance_file, fcntl.LOCK_EX | fcntl.LOCK_NB)
+@@ -194,7 +199,7 @@
+             self.ui.num_off_widget.show()
+ 
+         desktop = QApplication.desktop()
+-        if (desktop.screenCount > 1):
++        if (desktop.screenCount() > 1):
+             desktop = desktop.screenGeometry(0)
+         self.move((desktop.width() - self.width()) / 2, (desktop.height() - self.height()) / 2)
+         self.ui.tipWidget.show()
diff -Nru kylin-display-switch-1.0.1/debian/patches/series kylin-display-switch-1.0.1/debian/patches/series
--- kylin-display-switch-1.0.1/debian/patches/series	1970-01-01 08:00:00.000000000 +0800
+++ kylin-display-switch-1.0.1/debian/patches/series	2018-10-30 15:58:55.000000000 +0800
@@ -0,0 +1 @@
+fix_wrong_permission_file_and_add_missing_parentheses.diff